Introduction

import StellarSdk from 'stellar-sdk';

class ApiClient {
    private readonly apiUrl = "api.defindex.io";
    private readonly apiKey: string;

    constructor(apiKey: string) {
        this.apiKey = apiKey;
    }

    // Helper for POST requests
    async postData(endpoint: string, vaultAddress: string, params: Record<string, any>): Promise<any> {
        const response = await fetch(`https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${this.apiKey}`
            },
            body: JSON.stringify(params)
        });
        return await response.json();
    }

    // Helper for GET requests
    async getData(endpoint: string, vaultAddress: string, params?: Record<string, any>): Promise<any> {
        const url = params
            ? `https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}?${new URLSearchParams(params).toString()}`
            : `https://${this.apiUrl}/vault/${vaultAddress}/${endpoint}`;

        const response = await fetch(url, {
            method: 'GET',
            headers: {
                'Authorization': `Bearer ${this.apiKey}`
            }
        });
        return await response.json();
    }

    // Submit a signed transaction. POST /send lives at the API root, not under a vault.
    async send(signedXdr: string): Promise<any> {
        const response = await fetch(`https://${this.apiUrl}/send`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${this.apiKey}`
            },
            body: JSON.stringify({ xdr: signedXdr })
        });
        return await response.json();
    }
}

{
    amounts: [10000000],     // Array of amounts for each vault asset (7 decimals for XLM)
    caller: userAddress,     // User's wallet address
}

{
    amounts: [5000000],      // Array of amounts to withdraw from each asset
    caller: userAddress,     // User's wallet address
}

{
    xdr: signedXdr          // Signed transaction XDR
}